/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io;



import org.apache.avro.Schema;

import com.bff.gaia.unified.vendor.guava.com.google.common.base.Function;

import com.bff.gaia.unified.vendor.guava.com.google.common.base.Supplier;

import com.bff.gaia.unified.vendor.guava.com.google.common.base.Suppliers;



import java.io.Serializable;



/** Helpers for working with Avro. */

class AvroUtils {

  /** Helper to get around the fact that {@link Schema} itself is not serializable. */

  public static Supplier<Schema> serializableSchemaSupplier(String jsonSchema) {

    return Suppliers.memoize(

        Suppliers.compose(new JsonToSchema(), Suppliers.ofInstance(jsonSchema)));

  }



  private static class JsonToSchema implements Function<String, Schema>, Serializable {

    @Override

    public Schema apply(String input) {

      return new Schema.Parser().parse(input);

    }

  }

}